In all honesty I think these are very silly figures that can be safely ignored. The fieldwork overlapped with the far, far narrower YouGov poll - and of course YouGov itself overstated the SNP by several points last time round.

How's everyone's nerves?

UPDATE (1.15am): OK, as I watch Linda Fabiani jumping up and down in East Kilbride, maybe it wasn't quite such a daft poll!